A veteran Labour MP has warned the party is heading for "electoral disaster" unless its leadership shakes off its "bunker mentality" in the wake of its fourth place in the Sleaford and North Hykeham by-election.

Labour under fire after most MPs back Theresa May's Brexit timetable

Labour has faced an onslaught from all sides after most of its MPs backed Theresa May's plans to trigger the process for quitting the European Union by the end of March on condition the PM reveals her strategy.